Permatex Disc Brake Quiet stops brake squealing by dampening vibration at the caliper/brake pad interface.

When doing your own used car inspection, the problem can be fixed by lubricating the parking brake system. Seized caliper pistons can be removed with the hydraulic pressure off the brake system itself.

To remove a caliper piston that has become seized, the hydraulic pressure of the brake system itself can be used. Remove the caliper from the disc, and pump the brake pedal to move the piston past the corroded portion. Now you should be able to disassemble and rebuild it.

You should not have to lubricate the brake pistons. If you are replacing pads you should clean & lube the pistons. Brake lubricant can also be used to dampen vibrations between disc brake pads and caliper pistons.

You should not have to lubricate the brake pistons. If you are replacing pads you should clean & lube the pistons.

Recommended caliper cleaning & lubrication procedure: Lubricate metal-to-rubber friction points (guide pins to boots) with silicone lube (Wagner #F132005). Lubricate metal-to-metal friction points (brackets to guides/guides to pads) with a Molybdenum Disulfide lube, commonly called Moly Lube.

Permatex Ultra Disc Brake Caliper Lubricant is a green, nonmelting, synthetic lubricant. It is formulated to lubricate under the most adverse brake conditions, assuring that metal to metal contact areas remain lubricated throughout the pad life. For use on caliper pins, hardware, and the back-side of brake pads.

Over time, the slide pins lose their lubrication and don’t slide the calipers so well. This lack of lubrication causes a few things to happen. While there is a rubber cover protecting the slide pins, they experience brake dust and rust buildup, which hinders the calipers from sliding.

If you have uneven wear on a pad or something like that, suspect that there’s probably an issue with the caliper or the sliding mechanism of the caliper. Now the thing here is that you should be checking your brakes and lubricating all this stuff about every 12-15 thousand miles or once a year.

Before we re-insert the caliper guide pins into the caliper housing, they need to be properly lubricated. But remember, it’s always best to check your vehicle’s service manual before doing this kind of work. You’re going to need some high-temperature grease. They should slide right in if you used enough grease.

Not lubricating the guide pins: Caliper guide pins on floating calipers should be cleaned in solvent and new grease should be applied. The grease is under extreme heat and pressure so always use a caliper specific grease. NEVER put a torn boot back on a car.

When lubing your front caliper pins (mounting bolts and sleeves) and rubber bushings, be sure to use grease specifically designed for disk brakes that has silicone in it. The FSM recommends silicone grease.